High level targets for flood and coastal defence and elaboration of the Environment Agency's flood defence supervisory duty = Targedau lefel uchel ar gyfer amddiffynfeydd i'r arfordir a rhag llifogydd ac ymhelaethiad ar ddyletswyddau arolygu Asiantaeth yr Amgylchedd parthed amddiffyn rhag llifogydd /
Wales.National Assembly.Environment Division.
Cardiff : National Assembly for Wales,
2001.
Text in English and Welsh and bound back-to-back.
"April 2001"